INA2137UA - Dual ±6dB Audio Receiver | Texas Instruments
MPN： INA2137UA ✓ 啟用中INA2137UA 概覽
An audio differential line receiver is a specialized analog interface that converts a balanced, differential input into a single-ended audio signal. Its functional position is input conditioning: line receiver, differential receiver, analog signal conditioner, and interface IC. Differential reception is particularly useful when two conductors carry the same signal in opposite polarity, allowing common-mode noise to be rejected before the signal reaches an audio-processing or amplification stage.
Key features include low distortion of 0.0005% at 1 kHz, a slew rate of 14 V/µs, a fast settling time of 0.01%, and high common-mode rejection of 90 dB. The maximum quiescent current is 2.9 mA, while the wide ±18 V supply range supports conventional professional and consumer audio rails. Each receiver can provide a fixed gain of 1/2 or 2, corresponding to -6 dB or +6 dB.
The internal precision-resistor network provides repeatable gain without requiring external gain-setting resistors. This simplifies board design and reduces tolerance-related gain errors. High slew rate preserves large-signal dynamic range in music and speech paths, while low distortion minimizes added harmonic content. The 90 dB CMRR specification helps attenuate hum and interference picked up equally by both input conductors.
Typical applications include balanced professional-audio inputs, consumer audio equipment, active speaker systems, audio mixers, and instrumentation interfaces. The dual-channel configuration accommodates left and right channels in one package. The 14-pin SOIC also offers a practical standard footprint for through-hole assembly and conventional surface-mount production.
When designing a board around the INA2137UA, preserve the balanced input topology and keep input and return paths appropriately routed. Check output swing, input common-mode range, and gain configuration against the intended signal amplitude. Decoupling capacitors should be placed close to the supply pins, while unused inputs require appropriate treatment according to the manufacturer pin-description table.
This product overview combines the device's audio-performance figures, package information, pin and footprint considerations, replacement guidance, and application-level design guidance to support faster component evaluation and board-level implementation.
直接替換替代品，適用於 INA2137UA — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： INA2137UA （相同外形與佔位） — 差異在於 Number of Channels, Package.
INA2134UA/2K5
✅ 直接替換📋 參考替代品（不在目錄中）
INA2138UA/2K5
✅ 直接替換📋 參考替代品（不在目錄中）
INA2139UA/2K5
✅ 直接替換📋 參考替代品（不在目錄中）
INA2137UA 最大額定值與電氣特性
| Product Type | Dual audio differential line receiver |
| Number of Channels | 2 channels |
| Gain Options | +6 dB or -6 dB |
| Gain Values | 2 V/V or 0.5 V/V |
| Supply Voltage Range | ±18 V maximum |
| Maximum Quiescent Current | 2.9 mA |
| Common-Mode Rejection Ratio | 90 dB |
| Slew Rate | 14 V/µs |
| Distortion | 0.0005% at 1 kHz |
| Settling Time | 0.01% |
| 封裝 | 14-pin SOIC (D) |
| 安裝類型 | Surface mount |
INA2137UA 14-pin soic (d) 腳位配置指南
INA2137UA（14-pin soic (d) 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： INA2137UA.
請參閱 資料表 以查看完整腳位配置。
典型應用
INA2137UA 適用於 6 應用s: Balanced Professional Audio Input, Active Speaker Input Stage, Audio Mixer Interface, Consumer Audio Receiver, Audio Measurement Instrumentation, Broadcast and Studio Signal Routing.
Balanced Professional Audio Input
The INA2137UA fits a balanced professional-audio input because its differential architecture provides 90 dB CMRR while maintaining 0.0005% distortion at 1 kHz. The receiver can be placed directly at the input connector, where it rejects common-mode hum before the signal enters a mixing or amplification stage. Its selectable +6 dB or -6 dB gain provides flexibility for nominal consumer, line, or instrument-level routing, provided the selected mode preserves adequate headroom. The 14 V/µs slew rate also supports high dynamic-range audio without excessive distortion.
推薦
Active Speaker Input Stage
The INA2137UA is appropriate for an active-speaker input stage requiring balanced rejection and two-channel handling. Place one receiver for the left channel and the other for the right channel, then feed the single-ended outputs into the speaker amplifier. The INA2137UA's fixed gain options avoid external precision gain networks, while its 90 dB CMRR helps suppress interference induced in long speaker cables. The -6 dB mode is useful when preventing clipping, whereas +6 dB adds gain when the source level is low.
推薦
Audio Mixer Interface
The INA2137UA can condition balanced sources entering an audio mixer or console input module. Its two receivers per package conserve board area, and the internal precision-resistor network simplifies gain implementation. The 0.0005% distortion figure at 1 kHz helps preserve signal fidelity in mixing paths, while the 90 dB CMRR reduces common-mode hum from connected equipment. The design must still account for the selected gain, maximum output swing, and the input common-mode range required by the source.
推薦
Consumer Audio Receiver
The INA2137UA supports consumer audio equipment that accepts balanced line signals but requires a single-ended output for downstream processing. The dual ±18 V supply capability accommodates conventional analog audio rails, and the maximum quiescent current of 2.9 mA helps limit standby-related power demand. With gain fixed at either +6 dB or -6 dB, the receiver provides predictable signal scaling without external potentiometers. Its SOIC package also suits conventional mixed-signal consumer board assembly.
推薦
Audio Measurement Instrumentation
The INA2137UA can be used in balanced audio measurement equipment where low distortion and common-mode rejection influence reading accuracy. Its 0.0005% distortion at 1 kHz and 90 dB CMRR help separate signal-chain errors from the source under test. The fixed-gain configuration is useful in a calibrated instrument because it limits configuration variables. For precision work, confirm the applicable frequency range of the distortion and CMRR specifications and account for the selected gain when establishing input limits.
推薦
Broadcast and Studio Signal Routing
The INA2137UA is well matched to studio and broadcast routing electronics that receive balanced audio over long interconnects. Its 90 dB CMRR improves rejection of shared ground hum and induced common-mode noise, while 14 V/µs slew rate supports fast transients in program material. The two independent channels simplify stereo routing, and the selectable fixed gain helps match downstream headroom. Signal-integrity results still depend on maintaining a true balanced source and using a ground reference appropriate to the equipment architecture.
推薦
工程參考資料，適用於 INA2137UA — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | INA2134UA/2K5 | INA2138UA/2K5 | INA2139UA/2K5 |
|---|---|---|---|---|
| Package | 14-pin SOIC (D) | 14-pin SOIC (D) - same | 14-pin SOIC (D) - same | 14-pin SOIC (D) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Function | Dual audio differential line receiver | INA213-family audio receiver | INA213-family audio receiver | INA213-family audio receiver |
主要差異化特點
- Supports both attenuation and modest amplification in the same receiver family (對比INA2138UA/2K5)
- Provides dual balanced-audio channels in one package (對比INA2139UA/2K5)
- Combines low audio distortion with high common-mode rejection (對比INA2134UA/2K5)
設計說明
Route each balanced input as a closely coupled differential pair and keep the input traces away from switching nodes and high-current return paths. Use the manufacturer pin-description table to identify the input and gain-control pins. Because common-mode rejection depends partly on trace symmetry, avoid long stubs, unnecessary vias, and large differences in input trace length. Maintain a continuous ground reference beneath the analog signal path where the board stackup permits.
Confirm the selected +6 dB or -6 dB mode against source level, downstream headroom, and input common-mode range before finalizing the schematic. The receiver's 90 dB CMRR is valuable for balanced audio, but it does not eliminate clipping caused by an excessive differential or common-mode input. Check peak signal amplitude and the output swing under the intended load rather than relying on nominal audio levels.
Place supply-decoupling capacitors close to the relevant supply and ground pins, and keep the return-current path short. The dual-supply arrangement requires adequate bypassing for both rails. Follow the manufacturer application diagram for capacitor selection and placement, and keep analog output routing away from digital clocks and switching-regulator nodes to minimize injected noise and crosstalk.
合規資訊
The manufacturer product page and ordering information do not provide extractable compliance declarations for this product. Verify current material and environmental declarations with the manufacturer before release.